Table 5.

Additional features of placebo control design and implementation.

Feature	Reported in
	n	%
(Mis)informing patients that only efficacious treatments are investigated	32	16.2
Deliberately enhancing patients' expectations of therapeutic benefit (other means)	16	8.1
Only enrolling treatment-naïve patients	30	15.2
Enhancing control provider expectations of therapeutic benefit	9	4.8	Not applicable in 10 automated interventions (n = 189)
Providing specific training to the therapists to deliver the control intervention	43	22.8	Not applicable in 10 automated interventions (n = 189)

Total n = 178, unless otherwise indicated. Note that the provided assessments are dependent on author reporting.